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The force of friction between two bodies is ? (a) parallel to contact surface (b) perpendicular to contact surface (c) inclined to contact surface (d) a non contact force

The force of friction between two bodies is parallel to contact surface. Hence, the correct answer is option (a)

Why temperature is called a scalar quantity having a direction?

Scalar quantity is defined as the physical quantity with magnitude and no direction. On the other hand a vector quantity... View Article

What is the condition for pure rolling?

The process of rolling where no sliding is seen is referred to as pure rolling. Pure rolling is the combination... View Article

Force acting on the particle moving with constant speed in a straight line path: (a) Always zero (b) Need not to be zero (c) Always non zero (d) Cannot be concluded

Answer: (a) Always zero If the particle is moving at constant speed along a straight line path, that means the... View Article

The device used for measuring potential difference is known as: (a) Galvanometer (b) Ammeter (c) Potentiometer (d) Voltmeter

Answer: (d) Voltmeter Also, learn: Types of Voltmeter

Which type of force is exerted by electrostatic charge?

The force is exerted by electrostatic charge or electrically charged object is called electrostatic force. Also, learn: What is Electrostatic... View Article

Two particles execute SHM of same amplitude and frequency along the same straight line from same mean position. They cross one another without collision, when going in opposite direction, each time their displacement is half of their amplitude. The phase-difference between them is:

Let equations of motion of two particles be x=Asinωt ……….(i) x=Asin(ωt+ϕ) ………(ii) Putting x=A/2 in equation (i), we get; sinωt=1/2=sinπ/6... View Article

The electric potential v at any point (x y z), all in meters in space is given by V = 4x² volt. The electric field at the point (1, 0, 2) in volt/meter is (a) 8 along negative X-axis (b) 8 along positive X-axis (c) 16 along negative X-axis (d) 16 along positive X-axis

Answer: (a) 8 along negative X-axis The electric field at general point (x, y, z) Potential function (V) = 4x2 \(\begin{array}{l}\vec{E}... View Article

Electrons of mass m with debroglie wavelength lambda fall on the target in an X-rays tube. The cut-off wavelength λ₀ of the emitted X-rays is: (a) λ₀ = λ (b) λ₀ = 2mcλ²/h (c) λ₀ = 2h/mc (d) λ₀ = 2m²c²λ³/h²

Let Ek be the kinetic energy of the electron Its linear momentum, p = √2mE Using de-broglie wavelength λ =... View Article

According to the Schrodinger a particle is equivalent to: (a) a wave (b) a particle only (c) both of them (d) none of them

(a) a wave According to Schrodinger, a particle is equivalent to a wave. Schrodinger Wave Equation Schrodinger wave equation is... View Article

What is one atmosphere?

One atmosphere is equal to 101325 Pascal. 1 atm ≈ 105

Force of gravity is least at: A) The equator B) The poles C) A point in between equator and any pole D) None of these

Answer: A) The equator

The quantum of electric charge in e s u? (a) 4.78 x 10^-10 (b) +1.6 x 10^-19 (c) 2.99 x 10^9 (d) -1.6 x 10^-19

Answer: (a) 4.78 x 10-10 The quantum of electric charge in Esu is 4.78 x 10-10

If z is a compressibility factor van der waals equation at low pressure can be: (A) Z = 1+(Pb/RT) (B) Z = 1 – (Pb/RT) (C) 1+(RT/Pb) (D) 1 – (a/VRT)

Answer: (D) 1 – (a/VRT) Van der Waals equation for 1 mole of real gas is: (P + a/V2)(V-b) =... View Article

RPA can be used to automate _______________________ a. None of the options b. statement reconciliation c. customer relationship management d. Both of the options.

Answer: (c.) customer relationship management

What will happen to the potential energy of the spring when it is compressed or stretched?

When we compress or extend a stretched spring, we experience a force equal to that applied by us in the... View Article

A particle is projected vertically upwards from a point A on the ground. It takes time t₁, to reach a point B, but it still continues to move up. It takes further time t₂ to reach the ground from point B then height of point B from the ground is: (a) [latex]frac{1}{2}g(t_{1}+t_{2})^{2}[/latex] (b) [latex]gt_{1}t_{2}[/latex] (c) [latex]frac{1}{8}g(t_{1}+t_{2})^{2}[/latex] (d) [latex]frac{1}{2}gt_{1}t_{2}[/latex]

Given Total time of particle = (t1 + t2) To find initial value Applying 2nd equation of motion \(\begin{array}{l}0 =... View Article

The unit of power is: (a) watt per second (b) joule (c) kilo joule (d) watt

The unit of power is watt. Hence option (d) is the correct answer

What is the range of a clinical thermometer?

The thermometer used for measuring the human body temperature is called a clinical thermometer. The range of a clinical thermometer... View Article

A battery of emf 10V and internal resistance 3 ohm is connected to a resistor. The current in the circuit is 0.5A. The terminal voltage of the battery when the circuit is closed is: (a) 10V (b) 0V (c) 1.5V (d) 8.5V

Given A battery of emf 10V and internal resistance 3Ω is connected to a resistor. The current in the circuit... View Article

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