Current Electricity Lowersixth Science Physics

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Test your understanding of current, charge, and their effects.

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YAKILI LMS

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Current Electricity Lowersixth Science Physics


Current Electricity Lowersixth Science PhysicsOnline version Test your understanding of current, charge, and their effects. by YAKILI LMS 1 In a steady state, current is constant along a uniform wire. Yes No 2 In a stationary conductor there is no magnetic field. Yes No 3 In all materials, resistance increases with temperature. Yes No 4 The average drift velocity is typically near the speed of light. Yes No 5 Drift velocity is the average velocity of charge carriers under field. Yes No 6 Drift velocity is the same as the thermal velocity. Yes No 7 A semiconductor cannot conduct electricity without impurities. Yes No 8 Increasing voltage while keeping resistance fixed increases current. Yes No 9 A voltmeter measures current. Yes No 10 The chemical effects of current involve electrolysis in solutions. Yes No 11 The heating effect of current is due to collisions of electrons with lattice atoms. Yes No 12 A conductor with high resistivity produces less heating for the same current than a low resistivity one. Yes No 13 Current is the flow of magnetic fields in a wire. Yes No 14 Magnetic force on a current-carrying wire can be described by F = B I L sin theta. Yes No 15 The drift velocity is typically much smaller than the speed of light. Yes No 16 Heating effect leads to power dissipated P = I^2 R. Yes No 17 Magnetic effects of current arise from moving charges producing magnetic fields. Yes No 18 Temperature can affect resistance of a conductor. Yes No 19 Electric current is the rate of flow of electric charges. Yes No 20 Electric current requires a closed circuit to flow. Yes No 21 Magnetization due to current can create electromagnets. Yes No 22 Doping can change conductivity of semiconductors. Yes No 23 The unit of magnetic field B is tesla, which is also used for voltage. Yes No 24 Copper is a poor conductor. Yes No 25 Increasing cross-sectional area decreases current for fixed voltage. Yes No 26 The chemical effects of current do not involve any chemical change. Yes No 27 Copper is a good conductor with high conductivity. Yes No 28 Ohm's law V = I/R is correct. Yes No 29 In an open circuit, current can flow. Yes No 30 Current in a wire is due to electrons moving opposite to conventional current. Yes No 31 Drift velocity is the speed of light. Yes No 32 The unit of current density J is V/m. Yes No 33 Increasing cross-section area reduces current density if current is fixed. Yes No 34 Work done by the electric field on charges is joules per coulomb. Yes No 35 All conductors have the same resistance at a given temperature. Yes No 36 The unit of current density J is A/m^2. Yes No 37 Electric current in semiconductors can be due to both electrons and holes. Yes No 38 Ohmic conductors have a constant resistance over a range of voltages. Yes No 39 Ohm's law relates voltage, current, and resistance as V = IR. Yes No 40 Electric current can exist in a vacuum without any charged particles. Yes No 41 Current is produced by protons moving along the wire. Yes No 42 Electrolysis occurs in gases, not liquids. Yes No 43 Holes do not contribute to current in p-type semiconductors. Yes No 44 Current density equals current divided by cross-sectional area. Yes No 45 Magnetic effects require changing current to exist. Yes No 46 The electrolyte in electrochemical cells conducts via ions, not electrons. Yes No 47 Semiconductors have resistivity between conductors and insulators. Yes No 48 In metals, electrons are primary charge carriers. Yes No 49 The direction of magnetic field around a straight current path follows the right-hand rule. Yes No 50 The unit of drift velocity is m/s. Yes No

Current Electricity Lowersixth Science Physics

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Created by

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Current Electricity Lowersixth Science PhysicsOnline version

by YAKILI LMS

In a steady state, current is constant along a uniform wire.

In a stationary conductor there is no magnetic field.

In all materials, resistance increases with temperature.

The average drift velocity is typically near the speed of light.

Drift velocity is the average velocity of charge carriers under field.

Drift velocity is the same as the thermal velocity.

A semiconductor cannot conduct electricity without impurities.

Increasing voltage while keeping resistance fixed increases current.

A voltmeter measures current.

The chemical effects of current involve electrolysis in solutions.

The heating effect of current is due to collisions of electrons with lattice atoms.

A conductor with high resistivity produces less heating for the same current than a low resistivity one.

Current is the flow of magnetic fields in a wire.

Magnetic force on a current-carrying wire can be described by F = B I L sin theta.

The drift velocity is typically much smaller than the speed of light.

Heating effect leads to power dissipated P = I^2 R.

Magnetic effects of current arise from moving charges producing magnetic fields.

Temperature can affect resistance of a conductor.

Electric current is the rate of flow of electric charges.

Electric current requires a closed circuit to flow.

Magnetization due to current can create electromagnets.

Doping can change conductivity of semiconductors.

The unit of magnetic field B is tesla, which is also used for voltage.

Copper is a poor conductor.

Increasing cross-sectional area decreases current for fixed voltage.

The chemical effects of current do not involve any chemical change.

Copper is a good conductor with high conductivity.

Ohm's law V = I/R is correct.

In an open circuit, current can flow.

Current in a wire is due to electrons moving opposite to conventional current.

Drift velocity is the speed of light.

The unit of current density J is V/m.

Increasing cross-section area reduces current density if current is fixed.

Work done by the electric field on charges is joules per coulomb.

All conductors have the same resistance at a given temperature.

The unit of current density J is A/m^2.

Electric current in semiconductors can be due to both electrons and holes.

Ohmic conductors have a constant resistance over a range of voltages.

Ohm's law relates voltage, current, and resistance as V = IR.

Electric current can exist in a vacuum without any charged particles.

Current is produced by protons moving along the wire.

Electrolysis occurs in gases, not liquids.

Holes do not contribute to current in p-type semiconductors.

Current density equals current divided by cross-sectional area.

Magnetic effects require changing current to exist.

The electrolyte in electrochemical cells conducts via ions, not electrons.

Semiconductors have resistivity between conductors and insulators.

In metals, electrons are primary charge carriers.

The direction of magnetic field around a straight current path follows the right-hand rule.

The unit of drift velocity is m/s.