Practice Set 1
An electron gun is placed inside a long solenoid of radius R on its axis. The solenoid has n turns/length and carries a current I. The electron gun shoots an electron along the radius of the solenoid with speed v. If the electron does not hit the surface of the solenoid, maximum possible value of v is (all symbols have their standard meaning) :
23
Sep
An electron gun is placed inside a long solenoid of radius R on its axis. The solenoid has n turns/length and carries a current I. The electron gun shoots an electron along the radius of the solenoid with speed v. If the electron does not hit the surface of the solenoid, maximum possible value of [...]
A plane electromagnetic wave is propagating along the direction (i + j)/√2, with its polarization along the direction k. The correct form of the magnetic field of the wave would be (here B0 is an appropriate constant) :
23
Sep
A plane electromagnetic wave is propagating along the direction (i + j)/√2, with its polarization along the direction k. The correct form of the magnetic field of the wave would be (here B0 is an appropriate constant) : A plane electromagnetic wave is propagating along the direction (i + j)/√2 with its polarization along the [...]
In LC circuit the inductance L = 40 mH and capacitance C = 100 µF. If a voltage V(t) = 10 sin(314 t) is applied to the circuit, the current in the circuit is given as :
23
Sep
In LC circuit the inductance L = 40 mH and capacitance C = 100 µF. If a voltage V(t) = 10 sin(314 t) is applied to the circuit, the current in the circuit is given as : In LC circuit the inductance L = 40 mH and capacitance C = 100 µF. If a voltage [...]
A small spherical droplet of density d is floating exactly half immersed in a liquid of density ρ and surface tension T. The radius of the droplet is (take note that the surface tension applies an upward force on the droplet) :
23
Sep
A small spherical droplet of density d is floating exactly half immersed in a liquid of density ρ and surface tension T. The radius of the droplet is (take note that the surface tension applies an upward force on the droplet) : Which of the following gives a reversible operation? September 23, 2021 Category: JEE [...]
An electron of mass m and magnitude of charge |e| initially at rest gets accelerated by a constant electric field E. The rate of change of de-Broglie wavelength of this electron at time t ignoring relativistic effects is :
23
Sep
An electron of mass m and magnitude of charge |e| initially at rest gets accelerated by a constant electric field E. The rate of change of de-Broglie wavelength of this electron at time t ignoring relativistic effects is : Which of the following gives a reversible operation? September 23, 2021 Category: JEE Mains Physics 2002-2019 [...]
Two gases-argon (atomic radius 0.07 nm, atomic weight 40) and xenon (atomic radius 0.1 nm, atomic weight 140) have the same number density and are at the same temperature. The ratio of their respective mean free times is closest to :
23
Sep
Two gases-argon (atomic radius 0.07 nm, atomic weight 40) and xenon (atomic radius 0.1 nm, atomic weight 140) have the same number density and are at the same temperature. The ratio of their respective mean free times is closest to : atomic weight 140) have the same number density and are at the same temperature. [...]
Two identical capacitors A and B, charged to the same potential 5V are connected in two different circuits as shown below at time t = 0. If the charge on capacitors A and B at time t = CR is QA and QB respectively, then (Here e is the base of natural logarithm)
23
Sep
Two identical capacitors A and B, charged to the same potential 5V are connected in two different circuits as shown below at time t = 0. If the charge on capacitors A and B at time t = CR is QA and QB respectively, then (Here e is the base of natural logarithm) charged to [...]
A wire of length L and mass per unit length 6.0 × 10^–3 kgm–1 is put under tension of 540 N. Two consecutive frequencies that it resonates at are : 420 Hz and 490 Hz. Then L in meters is :
23
Sep
A wire of length L and mass per unit length 6.0 × 10^–3 kgm–1 is put under tension of 540 N. Two consecutive frequencies that it resonates at are : 420 Hz and 490 Hz. Then L in meters is : A wire of length L and mass per unit length 6.0 × 10^–3 kgm–1 [...]
A particle of mass m is projected with a speed u from the ground at an angle θ = π/3 w.r.t. horizontal (x-axis). When it has reached its maximum height, it collides completely inelastically with another particle of the same mass and velocity u i . The horizontal distance covered by the combined mass before reaching the ground is:
23
Sep
A particle of mass m is projected with a speed u from the ground at an angle θ = π/3 w.r.t. horizontal (x-axis). When it has reached its maximum height, it collides completely inelastically with another particle of the same mass and velocity u i . The horizontal distance covered by the combined mass before [...]
Tags:
A particle of mass m is projected with a speed u from the ground at an angle θ = π/3 w.r.t. horizontal (x-axis). When it has reached its maximum height ,
it collides completely inelastically with another particle of the same mass and velocity u i . The horizontal distance covered by the combined mass before reaching the ground is: ,
The current i in the network is
23
Sep
The current i in the network is The current i in the network is September 23, 2021 Category: JEE Mains Physics 2002-2019 Solved Video Solutions , Practice Set 1 ,