List of top Physics Questions

Two long parallel wires carrying currents $8 A$ and $15 A$ in opposite directions are placed at a distance of $7 cm$ from each other A point $P$ is at equidistant from both the wires such that the lines joining the point $P$ to the wires are perpendicular to each other The magnitude of magnetic field at $P$ is___$\times 10^{-6} T$(Given : $\sqrt{2}=1.4$ )

A square loop of area $25\ cm^2$ has a resistance of $10\ Ω$. The loop is placed in uniform magnetic field of magnitude $40.0 \ T$. The plane of loop is perpendicular to the magnetic field. The work done in pulling the loop out of the magnetic field slowly and uniformly in $1.0$ sec, will be

In a series LCR circuit, the inductance L is 10 mH, Capacitance C is 1μF and resistance R is 100Ω. The frequency at which resonance occurs is

A bullet is fired from a gun at the speed of 280 ms^-1 in the direction 30° above the horizontal. The maximum height attained by the bullet is
(g = 9.8 ms^-2, sin 30° = 0.5)

If $\vec{P}=3 \hat{i}+\sqrt{3} \hat{j}+2 \hat{k}$ and $\vec{Q}=4 \hat{i}+\sqrt{3} \hat{j}+25 \hat{k}$ then, The unit vector in the direction of $\vec{P} \times \vec{Q}$ is $\frac{1}{x}(\sqrt{3} i+\hat{j}-2 \sqrt{3} \hat{k})$ The value of $x$ is

On a temperature scale X, the boiling point of water is 65° X and the freezing point is 15° X. Assume that the X scale is linear. The equivalent temperature corresponding to 95° X on the Fahrenheit scale would be:

Calculate the maximum acceleration of a moving car so that a body lying on the floor of the car remains stationary. The coefficient of static friction between the body and the floor is 0.15 (g=10ms^-2).

An object moves with speed $v_1, v_2$ and $v_3$ along a line segment $AB , BC$ and $C D$ respectively as shown in figure Where $AB = BC$ and $AD =3 AB$, then average speed of the object will be:

When vector $\overrightarrow A = 2\hat i+3\hat J+2\hat k$ is subtracted from vector $\overrightarrow B$ , it gives a vector equal to $2\hat j$ . Then the magnitude of vector $\overrightarrow B$ will be :

Two resistances are given as $R_1=(10 ±0.5) Ω$ and $R_2= (15±0.5) Ω$. The percentage error in the measurement of equivalent resistance when they are connected in parallel is -

The work functions of Caesium (Cs), Potassium (K) and Sodium (Na) are 2.14eV, 2.30 eV and 2.75eV respectively. If incident electromagnetic radiation has an incident energy of 2.20eV, which of these photosensitive surfaces may emit photoelectrons?

A vehicle travels half the distance with speed θ and the remaining distance with speed 2θ. its average speed is

If the position of a particle is changing with time as r=t²-2t (m). Find the velocity at t=2s.

A football player is moving southward and suddenly turns eastward with the same speed to avoid an opponent. The force that acts on the player while turning is:

If the galvanometer G does not show any deflection in the circuit shown, the value of R is given by:

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R:
S-1 $\rightarrow$ Steel is used in construction of a bridge and house.
S–2 $\rightarrow$ Modulus of elasticity of steel is high.
In the light of the above statements, choose the correct answer from the options given below

Spherical insulating ball and a spherical metallic ball of same size and mass are dropped from the same height Choose the correct statement out of the following (Assume negligible air friction)

A parallel plate capacitor of capacitance 2 F is charged to a potential V. The energy stored in the capacitor is E. The capacitor is now connected to another uncharged identical capacitor in parallel combination. The energy stored in the combination is E₅. The ratio $ E_5 / E_1 $ is:

Match List I with List II

List I	List II
(A) Zener Diode	(II) Voltage Regulator
(B) LED	(III) Remote Control
(C) Rectifier	(IV) AC to DC
(D) Photo diode	(I) Detect optical signal

For the following logic circuit, the truth table is:

For three low density gases $A , B , C$ pressure versus temperature graphs are plotted while keeping them at constant volume, as shown in the figure.

The temperature corresponding to the point ' $K$ ' is :

If 1000 droplets of water of surface tension 0.07 N/m, having same radius 1 mm each, combine to from a single drop In the process the released surface energy is - (Take π=$\frac {22}{7}$)

The coercivity of a bar magnet is 140 A m$^{-1}$. To demagnetize it, it is placed inside a solenoid of length 1.6 m and number of turns 112. What is the current flowing through the solenoid?

A bullet from a gun is fired on a rectangular wooden block with velocity u. When the bullet travels 24 cm through the block along its length horizontally, velocity of bullet becomes $\frac{u}{3}$. Then it further penetrates into the block in the same direction before coming to rest exactly at the other end of the block. The total length of the block is:

Choose the correct statements from the following:
A. The total charge in any isolated system remains constant.
B. When some charge is transferred to a conductor, it stays at the same place without getting distributed over the entire surface.
C. One Coulomb of negative charge is the total charge of $6.25 \times 10^{18}$ electrons.
D. Electric field is a scalar field.
E. Permanent dipole means that the dipole moment $\vec{P}$ exists irrespective of external electric field $\vec{E}$.