1. What is the unit of power?

a) Joule

b) Watt

c) Ampere

d) Volt

2. What is the formula for power?

a) P = V x I

b) P = I^2 x R

c) P = V^2 / R

d) P = I x R

3. What is the formula for calculating electrical energy?

a) E = P x t

b) E = V x I

c) E = V^2 / R

d) E = I^2 x R

4. What is the formula for calculating electrical current?

a) I = P / V

b) I = V / R

c) I = E / t

d) I = √(P x R)

5. What is the formula for calculating electrical voltage?

a) V = P / I

b) V = I x R

c) V = E / I

d) V = √(P x t)

6. What is the formula for calculating electrical resistance?

a) R = V / I

b) R = P / I^2

c) R = V^2 / P

d) R = I x t

7. What is the formula for calculating power factor?

a) Pf = P / V x I

b) Pf = cos(θ)

c) Pf = V / I

d) Pf = P / √(P^2 + Q^2)

8. What is the formula for calculating apparent power?

a) S = V x I

b) S = P / Pf

c) S = √(P^2 + Q^2)

d) S = V x I x cos(θ)

9. What is the formula for calculating reactive power?

a) Q = V x I x sin(θ)

b) Q = P x t

c) Q = S x Pf

d) Q = √(P^2 + V^2)

10. What is the formula for calculating complex power?

a) Z = R + jX

b) Z = √(R^2 + X^2)

c) Z = V / I

d) Z = P / Q

Answers:

1. b
2. a
3. a
4. b
5. a
6. a
7. b
8. c
9. a
10. a