EmSAT EmSAT Physics 3

Question 1

What is Ohm's Law?

Accepted Answer

V = IR

Answer

I = VR

Answer

R = VI

Answer

P = VI

Question 2

What is the SI unit of electrical resistance?

Accepted Answer

Ohm

Answer

Ampere

Answer

Volt

Answer

Watt

Question 3

In a series circuit, how does current behave?

Accepted Answer

It is the same throughout

Answer

It is different at each component

Answer

It splits at each junction

Answer

It increases with each component

Question 4

What happens to total resistance when resistors are connected in parallel?

Accepted Answer

Total resistance decreases

Answer

Total resistance increases

Answer

Total resistance equals the sum of all resistors

Answer

Total resistance remains unchanged

Question 5

Calculate the power dissipated by a 10 Ω resistor with 2 A flowing through it.

Accepted Answer

40 W

Answer

5 W

Answer

20 W

Answer

100 W

Question 6

What converts electrical energy to mechanical energy?

Accepted Answer

Electric motor

Answer

Generator

Answer

Transformer

Answer

Resistor