A person can see clearly object only when they lie between 50 cm and 400 cm from his eyes. In order to increase the maximum distance of distinct vision to infinity, the type and power of the correcting lens, the person has to use, will be :
From which one of the following is the percentage of reflected amount of radiation highest?
Consider the following statements :
Which of the following types of vegetation is characterized by the above?
Which one of the following is the mode of heat tansfer in which warm material is transported so as to displace a cooler material?
Which one of the following is the amount of heat given up when 20g of steam at 100°C is condensed and cooled to 20°C?
A sonometer wire having a length of 50 cm is vibrating in the fundamental mode with a frequency of 100 Hz. Which of the following is the type of propagating wave and its speed?
The standing wave pattern along a string of length 60 cm is shown in the above diagram. If the speed of the transverse wave on this string is 300 m/s, in which one of the folowing modes is the string vibrating?
Match List I with List II and select the correct answer using the code given below the lists
How far must a girl stand in front of a concave spherical mirror of radius 120cm to see an erect image of her face four times its natural size?
If an α-particle is projected normally through a uniform magnetic field, then the path of the α-particle inside the field will be
Which among the following is the necessary condition for simple harmonic motion?
A long jumper runs before jumping because he
The force experienced by a unit positive test charge placed at a point is called
Which one of the following is the value of current I in the circuit shown above?
Which one of the following is not electromagnetic in nature?
Propagation of light quanta may be described by
Consider the following parts of spectra
Which one of the following is the correct sequence in which their wavelengths increase?
The electric charge is stored in a device called
Which one of the following statements correctly defines power?
In vacuum, the speed of light
To obtain the powerful parallel beams of light from a vehicle's headlight, one must use
Two thin convex lenses of focal lengths 4 cm and 8 cm are separated by a distance of 4 cm in air. The combination will have the focal length
The combined focal length F of two convex lenses of focal lengths f1 and f2, separated by a distance d can be calculated by using the formula 1/F = 1/f1 + 1/f2 - d/f1.f2.
Two metallic wires A and B are of same material and have equal length. If the cross-sectional area of B is double that of A, then which one among the following is the electrical resistance of B?
The torque on a rectangular coil placed in a uniform magnetic field is large when the
The thermal conductivity of copper is 4 items that of brass. Two rods of copper and brass having same length and cross-section are joined end to end. The free end of copper is at 0o C and the free end of brass is at 100o C. The temperature of the junction is
If the focal length of the biconvex lens is 25 cms, then the power of the lens will be
The lens strength in diopters is defined as the inverse of the focal length in meters. Thus 1/25 multiplied by 100 gives us the power of 4 dioptres which is postive for convex lens and negative for concave lens.
A body attached to a spring balance weighs 10 kg on the Earth. The body attached to the same spring balance is taken to a planet where gravity is half that of the Earth. The balance will read
Body A of mass 2 kg and another body B of mass 4 kg and of same material are kept in the same sunshine for some interval of time. If the rise in temperature is equal for both the bodies, then which one among the following in this regard is correct?
When a solid object is immersed in water, there is a loss in its weight. This loss is
An electric lamp of 100 watt is used for 10 hours per day. The ‘units’of energy consumed in one day by the lamp is