Pakistan MCQs

Equal parallel resistors have equivalent R/n.
6/3 = 2 Ω.

'Will' backshifts to 'would,' and 'tomorrow' becomes 'the next day.'
The object pronoun changes according to the reporting context.

Electrical power is P=VI.
P=240×5 = 1200 W.

The simple past may backshift to the past perfect in reported speech.
'Yesterday' changes to 'the previous day.'

For a uniform field, flux is BA cosθ.
Its SI unit is the weber.

AC reverses direction with time.
Mains electricity is commonly sinusoidal alternating current.

Transformers use changing magnetic flux in coupled coils.
They ideally conserve power while changing voltage and current.

Use F=kq1q2/r² with charges in coulombs.
F=9×10^9×2×10^-6×3×10^-6 = 0.054 N.

Coulomb force varies inversely with distance squared.
Tripling distance multiplies force by 1/3² = 1/9.

Electric field is force per unit charge.
E=20/4 = 5 N/C.

Electrical work is W=QV.
W=2×12 = 24 J.

Charge is Q=It.
Q=3×20 = 60 C.