Electromotive Force -Multiple Choice Questions Quiz

Interactive MCQs on “Electromotive Force”:

Solve the following 10 questions. Only one option is correct. Click on the “Submit” button when done. Click on the “embed” button to use this quiz on your website. Click on “WhatsApp” to share this quiz.

Question 1: What is Electromotive Force (EMF)?

(a) The force that causes electrons to flow in a circuit
(b) The force that opposes the flow of current in a circuit
(c) The potential difference across a resistor
(d) The potential difference across a capacitor

Question 2: Which unit is used to measure Electromotive Force (EMF)?

(a) Ohms (Ω)
(b) Amperes (A)
(c) Volts (V)
(d) Watts (W)

Question 3: What is the difference between EMF and potential difference (voltage)?

(a) EMF is the potential difference across a resistor, while voltage is the force that drives electrons.
(b) EMF and voltage are two different terms for the same concept.
(c) EMF is the force that drives electrons, while voltage is the potential difference across a circuit element.
(d) EMF and voltage have no relationship in an electric circuit.

Question 4: Which device is commonly used to provide a source of EMF in electrical circuits?

(a) Resistor
(b) Capacitor
(c) Battery
(d) Inductor

Question 5: EMF is measured in terms of:

(a) Energy per unit charge
(b) Charge per unit energy
(c) Energy per unit time
(d) Charge per unit time

Question 6: What does Kirchhoff's voltage law state about EMF in a closed loop circuit?

(a) EMF is always equal to the total resistance in the circuit.
(b) EMF is constant in a closed loop circuit.
(c) The sum of EMFs around a closed loop is zero.
(d) EMF increases with the number of circuit elements.

Question 7: What is the EMF of an ideal voltage source with no internal resistance?

(a) Zero
(b) Infinite
(c) It depends on the load connected to the source.
(d) It cannot be determined.

Question 8: In a circuit with both EMF sources and resistors, what is the total voltage (potential difference) across the circuit?

(a) The sum of all EMFs in the circuit
(b) The sum of all resistances in the circuit
(c) The difference between the total EMFs and total resistances in the circuit
(d) The product of the total EMFs and total resistances in the circuit

Question 9: In a circuit with EMF sources and resistors, what happens to the potential difference across the resistors when the circuit is open (no current flowing)?

(a) The potential difference across the resistors is zero.
(b) The potential difference across the resistors is equal to the total EMF of the circuit.
(c) The potential difference across the resistors is equal to the sum of all the EMFs in the circuit.
(d) The potential difference across the resistors is undefined.

Question 10: What happens to the EMF of a battery as it discharges its stored energy?

(a) The EMF increases.
(b) The EMF decreases.
(c) The EMF remains constant.
(d) The EMF becomes zero.