Guinness MCQs for Khuddam-ul-Hujjaj/ Nazims

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10583 Questions

3021

An electric motor is used to lift the weight of 2.0N through a vertical distance of 100 cm in 4 sec. What is the power output of the motor?

A. 0.25 W B. 0.5 W C. 0.75 W D. 1 W

3022

The centripetal acceleration of an object moving along a circle of radius 'r' with an angular speed 'w' is given by the formula:

A. a = rω² B. a = r ω C. a = r² ω D. a = r² ω²

3023

An air craft makes a turn in a horizontal circle of radius100m. It is travelling with a velocity of 250m/sec. The angular velocity of the air craft will be:

A. 1.5 rad/sec B. 2.5 rad/sec C. 3 rad/sec D. 3.5 rad/sec

3024

Which one of the following is INCORRECT about the nodes when the string is plucked:

A. Amplitude of vibration is zero B. Do not move along the string C. Produced at the fixed ends of strings D. Distance between consecutive nodes is 1 wavelength

3025

In transverse waves the portion above the mean level is called:

A. Wave front B. Wave crest C. Wave trough D. Wave length

3026

Which one of the following does not cause stationary waves?

A. Two waves of equal frequency B. Two waves of same speed C. Two waves of unequal amplitude D. Two waves travelling in opposite directions

3027

The formula V = W / qₒ represents?

A. Electric intensity B. Electric power C. Electric potential D. Electric field gradient

3028

The S.I unit of capacitance of a capacitor is:

A. Coulomb B. Volt C. Farad D. Ampere

3029

Electric intensity between two oppositely charge plates in the middle region is______?

A. Non-uniform B. Uniform C. Cannot be predicted D. Variable

3030

A charge of 90 C passes through a wire for 30 seconds. Then the current in the wire will be:

A. 3A B. 0.3 A C. 3 mA D. 0.3 mA

3031

Volt x Ampere is the measure of:

A. Current B. Volt C. Resistance D. Power

3032

The formula Φ = B.A represents?

A. Electric flux B. Magnetic flux C. Gravitational flux D. Electric flux density

3033

The unit of magnetic flux density is:

A. Wbm⁻¹ B. Wbm C. Wbm⁻² D. Wb

3034

The induced current will flow in such a direction so as to oppose the cause that produces it is statement of:

A. Ampere's Law B. Faraday's Law C. Lenz's Law D. Joule's Law

3035

In an AC generator the emf will be maximum when factor sinωt is equal to?

A. Zero B. 1/2 C. 1 D. 2

3036

Electric generators and transformers are based on the principles of:

A. Coulomb's law B. Faraday's law C. Ampere's law D. Hook's law

3037

In an ideal transformer:

A. Power input is equal to Power output B. Power input is less than half of the power output C. Power input is more than half of the power output D. Power input is greater than Power output

3038

The conversion of A.C into D.C is called rectification and circuit is called rectifier. Which component of electronics acts as a rectifier?

A. Diode B. Transistor C. Transformer D. Inductor

3039

Full wave rectification is given by:

A. One diode connected in bridge type arrangements B. Two diodes connected in bridge type arrangements C. Three diodes connected in bridge type arrangements D. Four diodes connected in bridge type arrangements

3040

The value of Planck constant is ?

A. 6.63×10⁻³⁴Js B. 6.63×10³⁴ Js C. 6.63×10⁻³⁴Js⁻¹ D. 6.63×10³⁴Js⁻¹

Guinness World Records (General Knowledge Focus) MCQs with Answers & Explanations (Page 152)

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