Q1) What is the SI unit of electric current?

a) Volts

b) Ampere

c) Coulomb

d) Ohm

Q2) Which of the following materials has the highest conductivity?

a) Glass

b) Rubber

c) Copper

d) Wood

Q3) Which law states that the current flowing through a conductor is directly proportional to the voltage across it, given constant temperature?

a) Ohm's Law

b) Gauss's Law

c) Coulomb's Law

d) Kirchhoff's Law

Q4) A circuit has a resistance of 10 ohms and a current of 2 amperes flowing through it. What is the voltage across the circuit?

a) 5 volts

b) 20 volts

c) 2 volts

d) 0.2 volts

Q5) Which of the following is a unit of electrical resistance?

a) Watt

b) Ohm

c) Ampere

d) Coulomb

Q6) When resistors are connected in series, their total resistance is:

a) The sum of their individual resistances

b) The product of their individual resistances

c) Always zero

d) Always infinite

Q7) A circuit has a voltage of 12 volts and a resistance of 4 ohms. What is the current flowing through the circuit?

a) 3 amperes

b) 48 amperes

c) 12 amperes

d) 4 amperes

Q8) Which of the following materials is a good insulator?

a) Copper

b) Aluminum

c) Glass

d) Silver

Q9) What happens to the resistance of a conductor if its temperature increases?

a) Increases

b) Decreases

c) Remains the same

d) Depends on the material

Q10) What is the electrical symbol for a resistor?

a) R

b) C

c) L

d) E

Q11) What is the direction of conventional current flow?

a) From positive to negative

b) From negative to positive

c) It depends on the circuit

d) It doesn't have a specific direction

Q12) Which device is used to measure electric current?

a) Voltmeter

b) Ammeter

c) Multimeter

d) Ohmmeter

Q13) What is the total resistance when three resistors of 4 ohms, 6 ohms, and 8 ohms are connected in parallel?

a) 18 ohms

b) 2 ohms

c) 3 ohms

d) 6 ohms

Q14) What happens to the current in a series circuit if one resistor is removed?

a) Increases

b) Decreases

c) Stays the same

d) Becomes zero

Q15) Which of the following is a non-ohmic conductor?

a) Copper wire

b) Carbon resistor

c) Silver wire

d) Aluminum wire

Q16) What is the relationship between voltage, current, and resistance in a circuit according to Ohm's Law?

a) V = I × R

b) V = I / R

c) I = V × R

d) R = V / I

Q17) Which of the following materials has the highest resistivity?

a) Silver

b) Copper

c) Aluminum

d) Nichrome

Q18) A parallel circuit consists of three resistors: 2 ohms, 3 ohms, and 5 ohms. What is the equivalent resistance of the circuit?

a) 10/3 ohms

b) 1 ohm

c) 10 ohms

d) 5/6 ohms

Q19) Which law states that the total current entering a junction is equal to the total current leaving the junction in a circuit?

a) Gauss's Law

b) Faraday's Law

c) Kirchhoff's Current Law

d) Ampere's Law

Q20) What happens to the total resistance of a parallel circuit as more resistors are added?

a) Increases

b) Decreases

c) Stays the same

d) Depends on the value of the resistors