Science Club, SGUK

In a uniformly accelerated circular motion, angular acceleration is:

• Constant

• Zero

• Varies with radius

• Same as linear acceleration

A body dropped from a height H takes time T to reach the ground. The time taken to fall the last H/4 is:

• T/2

• T/4

• T√(1 - 3/4)

• T(1 - 1/2)^(1/2)

The dimensional formula of Planck's constant (h) is:

• [ML²T⁻¹]

• [ML²T⁻²]

• [ML²T⁻³]

• [ML²T⁻¹]

A capacitor is fully charged and then disconnected. If its plates are pulled apart, the energy stored:

• Increases

• Decreases

• Remains same

• Becomes zero

If the wavelength of a wave is doubled, what happens to its frequency (v) if speed remains constant?

• Doubled

• Halved

• Tripled

• Unchanged

Which law validates the conservation of linear momentum?

• Newton's First Law

• Newton's Second Law

• Newton's Third Law

• Kepler's Law

In photoelectric effect, stopping potential depends on:

• Frequency of light

• Intensity of light

• Time exposure

• Work function

Lenz's law is based on conservation of:

• Charge

• Energy

• Momentum

• Mass

Which of the following has maximum bond angle?

• CH₄

• NH₃

• H₂O

• BF₃

Which of the following molecules does NOT obey the octet rule?

• CO₂

• SF₆

• CH₄

• H₂O