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A ring rotates about the z axis as shown in the figure. The plane of rotation is x-y. At a certain instant, the acceleration of a particle P is (6hat{i}−8hat{j})ms⁻² . Find the angular acceleration of the ring and the angular velocity at that instant. Radius of the ring is 2m

Tangential acceleration refers to the force acting along the tangent. This is commonly referred to as at. The magnitude is given by at=R, where R... View Article

What is equivalent weight in chemistry?

The amount of substances that completely react with each other in the reaction is called equivalent weight in chemistry. Equivalent weight =... View Article

An aqueous solution of methanol in water has vapour pressure: A) Equal to that of water B) Equal to that of methanol C) More than that of water D) Less than that of water

Raoult’s Law states that in a solution, the partial vapour pressure of each volatile compound is directly proportional to its mole fraction in... View Article

The resistance in the two arms of the meter bridge are 5 Ω and R Ω , respectively. When the resistance R is shunted with an equal resistance, the new balance point is at1.6l1. The resistance R is

Known resistance, R = 5Ω Initial unknown resistance = RΩ New balancing point L = 1.6l1 We have, R/L = S/100−L--------- 1 Where, R is... View Article

A particle of charge q and mass m moves in a circular orbit of radius r with angular speed ω. The ratio of the magnitude of its magnetic moment to that of its angular momentum depends on

The angular momentum L of the particle is given by L=mr2w where w=2πn. ∴ Frequency n = w/2π Further i = q × n = wq/2π Magnetic Moment, M =... View Article

For an object projected from the ground with speed u, horizontal range is two times the maximum height attained by it. The horizontal range of the object is:

Here, we will use the relation between the horizontal range R, acceleration due to gravity g, initial speed u and the maximum height H, which is... View Article

pH of a saturated solution of Ba(OH)₂ is 12 . The value of Ksp is:

We know that pH for barium hydroxide is 12 . So, pOH = 14−pH pOH = 14−12 pOH = 2 Using the formula, pOH = 14 − 12=−log[OH−] 2 = − log[OH−]... View Article

A boat, which has a speed of 5km/h in still water, crosses a river of width 1km along the shortest path possible in 15 minutes. Find the velocity of the river?

Speed in still water is 5 km/h Let the velocity of the river be m km/h Width of the river is 1 km and time taken is 15 minutes, that is 14... View Article

Which hydrogen halide is most volatile?

Answer: HCl The volatility of the hydrogen halides can be compared on the basis of the size of the halides as, on moving down the group, the... View Article

A parallel plate capacitor stores a charge Q at voltage V. Suppose the area of the capacitor and the distance between the plates are each doubled then which is the quantity that will change?

Given, the charge stored by the capacitor is Q and voltage is V. Let the capacitance of the capacitor is C. The capacitance of a parallel plate... View Article

Which gas is absorbed in turpentine oil?

Ozone is absorbed in turpentine oil due to its oxidizing property.The properties of ozone and oxygen molecules are entirely different. When the... View Article

Current sensitivity of a galvanometer can be increased by decreasing?

The current flowing through the coil is proportional to the deflection, or angle of twist, of the suspension. The formula for a galvanometer's... View Article

A closed coil consists of 500 turns on a rectangular frame of the area 4.0cm2 and has a resistance of 500Ω . The coil is kept with its plane perpendicular to a uniform magnetic field of 0.2wb/m2 , the amount of charge flowing through the coil if it is turned over. (Rotate through 1800 ): –

Given parameters are: Number of turns n=500 area A = 4cm2 = 4×10−4m2 resistance R = 500Ω magnetic field B = 0.2wb/m2 We have to calculate... View Article

Moment of inertia does not depend upon A. Angular velocity of the body B. Shape and size C. Mass D. Position of the axis of rotation

Answer: A. Angular velocity of the body The moment of inertia is the quantity that determines how much torque is required for a given angular... View Article

A copper wire of diameter 1.6mm carries a current of 20A. Find the maximum magnitude of the magnetic field B due to this current.

By using the Biot-Savart law B = μ0NI/2R We can find a formula for current carrying straight wire to find the maximum magnetic strength, that... View Article

In which of the following ionization processes, the bond order has increased and the magnetic behaviour has changed? a) N2 to N₂⁺ b) C₂ to C₂⁺. c) NO to NO⁺ d) O2 to O₂⁺,

Answer: (c) Bond order is the number of chemical bonds between a pair of atoms. A) Bond order reduces from 3 to 2.5 while going from N2 to... View Article

In a LR circuit, R=10Ωand L=2H. If an alternating voltage of 120V and 60Hz is connected in this circuit, then the value current flowing in it will be ____________A

By using Ohm’s law V=IR we can find the value of current flowing in the circuit Here we have the value of potential difference 120V. In LR... View Article

The work done during the expansion of a gas from a volume of 4 dm3 to 6 dm3 against a constant external pressure of 3 atm is:

Work done during expansion of a gas is:- W = −P△V W = −P(Vfinal−Vinitial) W = −3(6−4) W = −6L − atm = −6 ×101.32 = ≈−608J When a free... View Article

For a reaction N2(g) + 3H2 (g) → 2NH3 (g) identify dihydrogen (H2) as a limiting reagent

N2(g) + 3H2(g) → 2NH3(g) In the given reaction, 1 mol of N2 requires 3 moles of H2 for the formation for ammonia. Thus, if the number of moles... View Article

Maximum change in oxidation number of nitrogen is ________ .

Nitrogen is the 7th element in the periodic table. Its electronic configuration is given by, 7N=1s22s22p3 Nitrogen can have oxidation states... View Article

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