Explanation

Light Year is the distance that light can travel in one year.

The distance light travels in one year is known as light year.

Explanation

Vector Quantities: Velocity, momentum, torque, acceleration.

Scalar Quantities: Work, distance, speed, mass.

Explanation

Explanation

Explanation

The product RC (Resistance × Capacitance) gives the time constant in an RC circuit.

Its unit is Ohm × Farad = seconds (s), which is the unit of time.

Explanation

The energy stored in a capacitor is given by U = (1/2)CV². If the potential difference (V) is doubled:

U ∝ V²

U' ∝ (2V)² = 4V²

So, the energy stored will increase by a factor of 4.

Explanation

Given the formula and calculation:

F = qE

= (1.6 × 10⁻¹⁹ C) × (1.8 × 10⁻⁸ N/C)

= 2.88 × 10⁻¹¹ N

Explanation

• The Candela (cd) is the SI unit of luminous intensity.
• It is defined as the luminous intensity of a monochromatic source that emits light at a frequency of 540 x 10^12 Hz with a luminous efficiency of 683 lm/W.

Explanation

My sister has been living in Paris for three years.

میری بہن تین سال سے پیرس میں رہ رہی ہے۔

We use "for" with a duration of time (e.g., for two hours, for ten years).

Explanation

In "Goodbye, Mr. Chips", there is a scene at the club where the discussion revolves around the themes of determination and opportunity, reflecting on how people rise in life through effort or circumstance.