NEET Physics | Daily MCQs Practice Questions | 17 July 2024 | NEET Exam

If instantaneous current in a circuit is given by I = (2 + 3 sin ωt)A, then the effective value of resulting current in the circuit is :-

A 50 Hz a.c. source of 20 volts is connected across R and C as shown in figure below. The voltage across R is12 volts. The voltage across C is :-

A conductor is charged to 50 μC then its potential becomes 10 V. Calculate the capacitance of the conductor :

A bomb of mass 12 kg at rest explodes into two fragments of masses in the ratio 1 : 3. The K.E. of the smaller fragment is 216 J. The linear momentum of heavier fragment (in kg-m/sec) is :-

A wire has non-uniform cross-section as shown in figure. A steady current flows through it and electric field at points P and Q is E_P and E_Q , then

Select the correct option:

A coil of area 0.1 m has 500 turns. After placing the coil in a magnetic field of strength 4 × 10^-4 Wb/m² , it is rotated through 90º in 0.1 second. The average e.m.f. induced in the coil is :

There is a uniform field $\overrightarrow{\mathrm{E}}$ in X-direction. If the work done on moving a charge 0.2 C through a distance of 2 m along a line making an angle 60° with the X-axis is 4.0 J, what is the value of $\overrightarrow{\mathrm{E}}$?

The length and breadth of a rectangle are (5.5 ± 0.1) cm and (2.5 ± 0.1) cm respectively. Calculate area of the rectangle with error limit.

The equation of motion of a projectile is :

$\mathrm{Y}=12\mathrm{x}-\frac{3}{4}{\mathrm{x}}^2$

Given that g = 10 ms^-2 , what is the range of the projectile ?

In the system shown in the figure, the acceleration of the 1 kg mass and the tension in the string connecting between A and B is :

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A proton enters in a magnetic field 1.0 T with a velocity of 2.5 × 10⁷ m/s at an angle of 30° with
the field. The magnetic force acting on the proton will be :-

Light of wavelength 4000Å falls on a photosensitive metal and a negative 2V potential stops the emitted electrons. The work function of the material (in neV) is approximately

(h = 6.6 × 10^-34 Js, e = 1.6 × 10^-19 C, c = 3×10⁸ ms^-1 )

Which one of the following nuclear reaction is a source of energy in the sun ?

Starting from the origin, a body oscillates simple harmonically with a period of 2 s. After what time will its kinetic energy be75% of the total energy?

When air of density 1.6 kg/m flows across the top of the tube, water rises to a height of 1.0 cm as shown in figure. The speed of air is :-

Select the correct option: