List of practice Questions

A p-n junction diode can be used as
A device which converts electrical energy into mechanical energy is
Cassiterite is an ore of
The alum used for purifying water is
The oxyacid of phosphorus in which phosphorushas the lowest oxidation state is
An elliptical cavity is carved within a perfect conductor. A positive charge q is placed at the centre of the cavity. The points A and B are on the cavity surface as shown in the figure.then
For the chemical reaction,$3 X ( g) + Y ( g) \rightleftharpoons \, X_3 \, Y $ ( g) the amount of $X_3 Y$ at equilibrium is affected by
Which of the following is regarded as a unit of nervous tissue?
Biaxial crystal among the following is
Mass of a photon of frequency v is given by
In the nuclear reaction $ _{13}A{{l}^{27}}(d,\alpha )x,X $ is:
The host animals for the members of Myzostomida belong to the class:
Which of the following metals is present in brass, bronze and german-silver?
The number of tastes in each mature proglottid of Taenia is:
The function of Mehalis glands in Taeniais:
How many g of dibasic acid (mol. wt. 200) should be present in 100 mL of the aqueous solution to give 0.1 normality ?
The resistance of a discharge tube is
A disc is rolling (without slipping) on a horizontal surface. C is its centre and Q and P are two points equidistant from C. Let $v_P$, $v_q$ and $v_c$ be the magnitude of velocities of points P,Q and C respectively, then
Bell-metal is an alloy of
The internal resistance of a cell of e.m.f. 2 V is $0.1\, \Omega$ It is connected to a resistance of $3.9\, \Omega$. The voltage across the cell will be
A potentiometer consists of a wire of length 4 m and resistance $10\, \Omega$ It is connected to a cell of e.m.f. 2 V. The potential difference per unit length of the wire will be
In a meter bridge, the balancing length from the left end (standard resistance of one ohm is in the right gap) is found to be 20 cm. The value of the unknown resistance is
Aldol condensation will not take place in
A person aiming to reach exactly opposite point on the bank of a stream is swimming with a speed of 0.5 m/s at an angle of $ 120^\circ$ with the direction of flow of water. The speed of water in the stream, is
A mass m supported by a massless string wound around a uniform hollow cylinder of mass m and radius R. If the string does not slip on the cylinder, with what acceleration will the mass fall on release?