Practice Set 1
For the four sets of three measured physical quantities as given below. Which of the following options is correct ?
23
Sep
For the four sets of three measured physical quantities as given below. Which of the following options is correct ? For the four sets of three measured physical quantities as given below. Which of the following options is correct ? September 23, 2021 Category: JEE Mains Physics 2002-2019 Solved Video Solutions , Practice Set 1 [...]
The energy required to ionise a hydrogen like ion in its ground state is 9 Rydbergs. What is the wavelength of the radiation emitted when the electron in this ion jumps from the second excited state to the ground state ?
23
Sep
The energy required to ionise a hydrogen like ion in its ground state is 9 Rydbergs. What is the wavelength of the radiation emitted when the electron in this ion jumps from the second excited state to the ground state ? Which of the following gives a reversible operation? September 23, 2021 Category: JEE Mains [...]
Two steel wires having same length are suspended from a ceiling under the same load. If the ratio of their energy stored per unit volume is 1 : 4, the ratio of their diameters is:
23
Sep
Two steel wires having same length are suspended from a ceiling under the same load. If the ratio of their energy stored per unit volume is 1 : 4, the ratio of their diameters is: the ratio of their diameters is: Two steel wires having same length are suspended from a ceiling under the same [...]
Planet A has mass M and radius R. Planet B has half the mass and half the radius of Planet A. If the escape velocities from the Planets A and B are VA and VB, respectively, then VA/VB = n/4. The value of n is :
23
Sep
Planet A has mass M and radius R. Planet B has half the mass and half the radius of Planet A. If the escape velocities from the Planets A and B are VA and VB, respectively, then VA/VB = n/4. The value of n is : Planet A has mass M and radius R. Planet [...]
In a fluorescent lamp choke (a small transformer) 100 V of reverse voltage is produced when the choke current changes uniformly from 0.25 A to 0 in a duration of 0.025 ms. The self-inductance of the choke (in mH) is estimated to be __________ .
23
Sep
In a fluorescent lamp choke (a small transformer) 100 V of reverse voltage is produced when the choke current changes uniformly from 0.25 A to 0 in a duration of 0.025 ms. The self-inductance of the choke (in mH) is estimated to be __________ . Which of the following gives a reversible operation? September 23, [...]
A rod of length L has non-uniform linear mass density given by ρ(x) = a + b(x/L)^2, where a and b are constants and 0 ≤ x ≤ L. The value of x for the centre of mass of the rod is at
23
Sep
A rod of length L has non-uniform linear mass density given by ρ(x) = a + b(x/L)^2, where a and b are constants and 0 ≤ x ≤ L. The value of x for the centre of mass of the rod is at A rod of length L has non-uniform linear mass density given by [...]
A body of mass m = 10 kg is attached to one end of a wire of length 0.3 m. The maximum angular speed (in rad s^–1) with which it can be rotated about its other end in space station is (Breaking stress of wire = 4.8 × 10^7 Nm^–2 and area of cross-section of the wire = 10^–2 cm^2) is:
23
Sep
A body of mass m = 10 kg is attached to one end of a wire of length 0.3 m. The maximum angular speed (in rad s^–1) with which it can be rotated about its other end in space station is (Breaking stress of wire = 4.8 × 10^7 Nm^–2 and area of cross-section of [...]
One end of a straight uniform 1m long bar is pivoted on horizontal table. It is released from rest when it makes an angle 30º from the horizontal (see figure). Its angular speed when it hits the table is given as √ns-1, where n is an integer. The value of n is __________ .
23
Sep
One end of a straight uniform 1m long bar is pivoted on horizontal table. It is released from rest when it makes an angle 30º from the horizontal (see figure). Its angular speed when it hits the table is given as √ns-1, where n is an integer. The value of n is __________ . Which [...]
The distance x covered by a particle in one dimensional motion varies with time t as x^2 = at^2 + 2bt + c. If the acceleration of the particle depends on x as x^–n, where n is an integer, the value of n is __________ .
23
Sep
The distance x covered by a particle in one dimensional motion varies with time t as x^2 = at^2 + 2bt + c. If the acceleration of the particle depends on x as x^–n, where n is an integer, the value of n is __________ . The distance x covered by a particle in one [...]
Both the diodes used in the circuit shown are assumed to be ideal and have negligible resistance when these are forward biased. Built in potential in each diode is 0.7 V. For the input voltages shown in the figure, the voltage (in Volts) at point A is __________ .
23
Sep
Both the diodes used in the circuit shown are assumed to be ideal and have negligible resistance when these are forward biased. Built in potential in each diode is 0.7 V. For the input voltages shown in the figure, the voltage (in Volts) at point A is __________ . Which of the following gives a [...]