10th Samacheer Quiz

Q1. In a parallel circuit, which quantity is the same across all branches?

Voltage Current Resistance Power

Q2. How should a voltmeter be connected?

In parallel In series Only outside the circuit Without connection

Q3. What should the resistance of a voltmeter be?

Very high Very low Zero Lower than a wire

Q4. If the length of a wire is doubled with other factors unchanged, its resistance becomes:

Double Half Four times Unchanged

Q5. Which is the correct form of Ohm’s law?

V = IR V = I/R R = VI I = VR

Q6. What is the SI unit of potential difference?

Volt Ampere Ohm Coulomb

Q7. Which is a correct formula for electric power?

P = VI P = V/I P = I/V P = IR²

Q8. If current is tripled while time and resistance stay constant, how does heat change?

Nine times Three times Half Unchanged

Q9. Which factors determine the resistance of a conductor?

Length, cross-sectional area, material and temperature Only colour Only shape Only time

Q10. Which equation gives equivalent resistance for resistors in parallel?

1/R = 1/R₁ + 1/R₂ + ... R = R₁ + R₂ + ... R = R₁R₂ R = V/I²

Electricity