Question 1

Which of the following is a unit of electric current?

Accepted Answer

Ampere is the SI unit of electric current. It is defined as one coulomb of charge flowing per second.

Question 2

The potential difference between two points is measured in:

Accepted Answer

Potential difference is measured in volts using a voltmeter connected in parallel across the points.

Question 3

Ohm's law relates current, voltage and resistance as:

Accepted Answer

According to Ohm's law, V = IR, where V is voltage, I is current, and R is resistance.

Question 4

What is the SI unit of electrical resistance?

Accepted Answer

The SI unit of electrical resistance is ohm, represented by the Greek letter omega (Ω).

Question 5

Which of the following factors affects the resistance of a conductor?

Accepted Answer

Resistance depends on length, cross-sectional area, nature of material, and temperature of the conductor.

Electricity — NCERT Class 10 Science Important Questions & Revision Notes