When a p.d is applied across a conductor, the electrons experience a force in?
Pendulum clocks become slow in summer because
Which of the following is not correctly matched?
An aeroplane is flying horizontally with a velocity of 600 km/h and at a height of 1960 m. When it is vertically at a point A on the ground a bomb is released from it. The bomb strikes the ground at point B. The distance AB is
A cubical vessel of height 1 m is full of water. What is the amount of work done in pumping water out of the vessel? (Take g =10 m s–2)
Consider the following statements and select the correct code.
Assertion (A): The velocity of sound in air increased due to the presence of moisture in it. Reason (R): The presence of moisture in air lowers the density of air.
What is the minimum thickness of a thin film required for constructive interference in the reflected light from it?
Given, the refractive index of the film = 1.5, wavelength of the light incident on the film = 600 nm.
If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same
Out of the following pairs, choose the pair in which the physical quantities do not have identical dimension?
For an external resistor “R” when internal resistance of a voltage source is ‘r’, then current is given by?
If an electric circuit could be compared to a water circuit at a water park, then the current would be analogous to the ____.
The following observations were taken for determining surface tensiton T of water by capillary method :
Diameter of capilary, D = 1.25 × 10–2 m rise of water, h = 1.45 × 10–2 m Using g = 9.80 m/s2 and the simplified relation T = rhg × 103 N/m, the possible error in surface 2
tension is closest to :
Light Emitting Diodes (LED) is used in fancy electronic devices such as toys emit
In a series resonant R-L-C circuit, the voltage across R is 100 V and the value of R = 1000 W. The capacitance of the capacitor is 2 ´ 10-6 F; angular frequency of AC is 200 rad s-1. Then the P.D. across the inductance coil is ______.
Which of the following statements is false ?
The weight of a body in a frame of reference is equal and opposite to the force required to prevent it?
Kilowatt-hour (KWH) is the unit of?
Two wires of the same dimensions but resistivities P1 and P2 are connected in series. The equivalent resistivity of the combination is
Siphon will fail to work if
A In Young's double slit experiment if monochromatic light used is replaced by white light, then _______.
When a body is immersed partly or wholly in a liquid, there is an apparent loss in weight of the body which is equal to the weight of liquid displaced by the body.
According to Ohm’s Law? current I = KV, where K is
Consider the following natural phenomena:
1. Terrestrial heating
2. Reflection of light
3. Refraction of light
4. Diffraction of light
Out of the following pairs, which one does not have identical dimension?
The incident ray, reflected ray and normal to the reflecting surface at the incident point all never lie in same plane.
The equation for the mass of earth is?
How many 6mF, 200 V condensers are needed to make a condenser of 18 pF, 600 V?
A closed organ pipe and an open organ pipe of same length produce 2 beats/second while vibrating in their fundamental modes. The length of the open organ pipe is halved and that of closed pipe is doubled. Then, the number of beats produced per second while vibrating in the fundamental mode is ______.