Current and resistance

What is the unit of resistance?

• Ohms (Ω)

• Volts (V)

• Amperes (A)

• Watts (W)

If the current is 2A and the voltage is 10V, what is the resistance?

• 2 Ω

• 5 Ω

• 10 Ω

• 20 Ω

What happens to the current in a circuit as resistance increases?

• The current increases.

• The current remains the same.

• The current decreases.

• The current fluctuates.

What is the effect of decreasing resistance on current with constant voltage?

• The current decreases.

• The current remains the same.

• The current increases.

• The current fluctuates.

What is Ohm's Law?

• Ohm's Law states that V = I x R, where V is voltage, I is current, and R is resistance.

• Ohm's Law states that P = V x I, where P is power, V is voltage, and I is current.

• Ohm's Law states that R = V / I, where R is resistance, V is voltage, and I is current.

• Ohm's Law states that I = R / V, where I is current, R is resistance, and V is voltage.

If a circuit has a resistance of 10Ω and a current of 3A, what is the voltage?

• 20V

• 30V

• 40V

• 10V

Define current in terms of charge flow.

• Current is the amount of electric charge in a circuit.

• Current is the rate of flow of electric charge.

• Current is the total voltage in a circuit.

• Current is the resistance to the flow of electric charge.

What are the units of current?

• Volts (V)

• Ohms (Ω)

• Amperes (A)

• Watts (W)

What is the effect of increasing voltage on current in a circuit with constant resistance?

• The current decreases.

• The current remains the same.

• The current increases.

• The current fluctuates.

What is the relationship between charge, current, and time?

• Charge flow (Q) = Current (I) x Time (t)

• Charge flow (Q) = Current (I) + Time (t)

• Charge flow (Q) = Current (I) / Time (t)

• Charge flow (Q) = Current (I) - Time (t)