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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... View Article

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 force?... 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),... 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 Therefore, electric field... 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 = h/p 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 is a mathematical expression describing the... View Article

What is one atmosphere?

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

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... View Article

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... View Article

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) = RT Since, at low pressure 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... View Article

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 opposite direction. When a spring... 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 We get, Since height at t = t1+ t2 = 0 At t =... 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... View Article

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 is from 35°C... 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 is 0.5A Emf of the battery, E=10V... View Article

A particle moving along x-axis has an acceleration f at time t, given by [latex]f = f_{0}(1-frac{t}{T})[/latex], where [latex]f_{0}[/latex] and T are constants. The particle at T = 0 has zero velocity. In the time interval between t = 0 and the instant when f = 0, the velocity (v_a) of the particle is then:(a) [latex]frac{1}{2}f_{0}T[/latex](b) [latex]f_{0}T[/latex](c) [latex]frac{1}{2}f_{0}T^{2}[/latex](d) [latex]f_{0}T^{2}[/latex]

Given and T are constants At t = 0 and v = 0 When f = 0 then, 0 = T = t ------------ (1) f = (final - initial velocity)/ Time From equation... View Article

A wheel has angular acceleration of 3.0 rad/s^2 and an initial angular speed of 2.00 rad/s. In a time of 2 s it has rotated through an angle (in radian) of: (A) 6 (B) 12 (C) 10 (D) 4

Answer: (C) 10 Solution: Initial angular speed, ω0 =2 rad/s Angular acceleration, α=3 rad/s2 t = 2s Hence, ... View Article

Acceleration of a projectile relative to another projectile is:

The acceleration of a projectile relative to another projectile is zero. It is because both the particles will have the same magnitude and... View Article

A particle has initial velocity (2i+3j) and acceleration (0.3i+0.2j) the magnitude of the velocity after 10 second will be: (a) 9√2 units (b) 5√2 units (c) 5 units (d) 9 units

Answer: (b)5√2 Given, u = 2i + 3j a = 0.3i + 0.2j t = 10s As, v = u + at v = (2i + 3j) + (0.3i + 0.2j) (10) = 2i + 3j + 3i + 2j =... View Article

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