Practice Set 1
Given below are two statement : one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : When a rod lying freely is heated, no thermal stress is developed in it. Reason R : On heating the length of the rod increases. In the light of the above statements, choose the correct answer from the options given below:
26
Sep
Given below are two statement : one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : When a rod lying freely is heated, no thermal stress is developed in it. Reason R : On heating the length of the rod increases. In the light of the above statements, [...]
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choose the correct answer from the options given below. ,
Given below are two statement : one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : When a rod lying freely is heated ,
no thermal stress is developed in it. Reason R : On heating the length of the rod increases. In the light of the above statements ,
An electromagnetic wave of frequency 3 GHz enters a dielectric medium of relative electric permittivity 2.25 from vacuum. The wavelength of this wave in that medium will be ….. × 10^–2 cm.
26
Sep
An electromagnetic wave of frequency 3 GHz enters a dielectric medium of relative electric permittivity 2.25 from vacuum. The wavelength of this wave in that medium will be ….. × 10^–2 cm. An electromagnetic wave of frequency 3 GHz enters a dielectric medium of relative electric permittivity 2.25 from vacuum. The wavelength of this wave [...]
Two cars are approaching each other at an equal speed of 7.2 km/hr. When they see each other, both blow horns having frequency of 676 Hz. The beat frequency heard by each driver will be ….. Hz [Velocity of sound in air is 340 m/s.]
26
Sep
Two cars are approaching each other at an equal speed of 7.2 km/hr. When they see each other, both blow horns having frequency of 676 Hz. The beat frequency heard by each driver will be ….. Hz [Velocity of sound in air is 340 m/s.] both blow horns having frequency of 676 Hz. The beat [...]
A series LCR circuit is designed to resonate at an angular frequency ω0 = 10^5 rad/s. The circuit draws 16 W power from 120 V source at resonance. The value of resistance ‘R’ in the circuit is …. Ω
26
Sep
A series LCR circuit is designed to resonate at an angular frequency ω0 = 10^5 rad/s. The circuit draws 16 W power from 120 V source at resonance. The value of resistance ‘R’ in the circuit is …. Ω A series LCR circuit is designed to resonate at an angular frequency ω0 = 10^5 rad/s. [...]
A signal of 0.1 kW is transmitted in a cable. The attenuation of cable is –5 dB per km and cable length is 20 km. The power received at receiver is 10^–x W. The value of x is …… [Gain in dB = 10 log10 (P0/Pi)]
26
Sep
A signal of 0.1 kW is transmitted in a cable. The attenuation of cable is –5 dB per km and cable length is 20 km. The power received at receiver is 10^–x W. The value of x is …… [Gain in dB = 10 log10 (P0/Pi)] The logic circuit shown above is equivalent to : [...]
A point charge of +12 μC is at a distance 6 cm vertically above the centre of a square of side 12 cm as shown in figure. The magnitude of the electric flux through the square will be ….. x 10^3 Nm^2/C .
26
Sep
A point charge of +12 μC is at a distance 6 cm vertically above the centre of a square of side 12 cm as shown in figure. The magnitude of the electric flux through the square will be ….. x 10^3 Nm^2/C . The logic circuit shown above is equivalent to : September 26, 2021 [...]
The root mean square speed of molecules of a given mass of a gas at 27°C and 1 atmosphere pressure is 200 ms^–1. The root mean square speed of molecules of the gas at 127°C and 2 atmosphere pressure is x /√ 3 ms^-1. The value of x will be …….
26
Sep
The root mean square speed of molecules of a given mass of a gas at 27°C and 1 atmosphere pressure is 200 ms^–1. The root mean square speed of molecules of the gas at 127°C and 2 atmosphere pressure is x /√ 3 ms^-1. The value of x will be ……. The logic circuit shown [...]
Two solids A and B of mass 1 kg and 2 kg respectively are moving with equal linear momentum. The ratio of their kinetic energies (K.E.)A : (K.E.)B will be A/1, so the value of A will be …
26
Sep
Two solids A and B of mass 1 kg and 2 kg respectively are moving with equal linear momentum. The ratio of their kinetic energies (K.E.)A : (K.E.)B will be A/1, so the value of A will be … so the value of A will be ... Two solids A and B of mass 1 [...]
A cylindrical wire of radius 0.5 mm and conductivity 5 × 10^7 S/m is subjected to an electric field of 10 mV/m. The expected value of current in the wire will be x^3p mA. The value of x is …….
26
Sep
A cylindrical wire of radius 0.5 mm and conductivity 5 × 10^7 S/m is subjected to an electric field of 10 mV/m. The expected value of current in the wire will be x^3p mA. The value of x is ……. A cylindrical wire of radius 0.5 mm and conductivity 5 × 10^7 S/m is subjected [...]
A uniform thin bar of mass 6 kg and length 2.4 meter is bent to make an equilateral hexagon. The moment of inertia about an axis passing through the centre of mass and perpendicular to the plane of hexagon is …… × 10^–1 kg m^2
26
Sep
A uniform thin bar of mass 6 kg and length 2.4 meter is bent to make an equilateral hexagon. The moment of inertia about an axis passing through the centre of mass and perpendicular to the plane of hexagon is …… × 10^–1 kg m^2 The logic circuit shown above is equivalent to : September [...]