Management of natural resources mainly deals with pollution control in the usage of resources.
Management of Natural Resources mainly deals with environmental conservation and sustainable use of resources.
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Rohan wants to coat his magic stick made of carbon with copper. He takes a battery, a container filled half with copper sulphate solution, a copper plate and his magic stick. But he is confused about which terminal of battery to connect to copper plate and which terminal to his magic stick. What should he do?
The copper from solution deposits to the electrode connected to negative terminal of battery. So, he will connect the carbon... View Article
Sparks due to lightning have same phenomenon as that of the sparks observed when one take off woolen clothes.
Lightning and the spark from the clothes are essentially the same phenomena.
A set up consisting of a bulb, salt solution and a magnetic compass is arranged in such a manner that bulb and salt solution come in between the electric wires connected to the cell and hence complete the circuit. The magnetic compass is wrapped with the connecting wires. When switched on, current flows through salt solution, the bulb glows and the needle deflects. Which of the following effects of current is involved in this?
When switched on, current flows through the circuit. The bulb glows due to the heating effect; it produces chemical effect when... View Article
A cylindrical bar magnet is keptalong the axis of a circular coil. If the magnet is rotated about its axis, then [CPMT 1983; BCECE 2004]
Because there is no change in flux linked with coil
A substance which is a great insulator will not conduct electric current under:
A great insulator will not conduct electricity under most conditions. But, if you push REALLY hard, the electrons can flow... View Article
Materials which do not allow electric current to flow through them is known as
Materials which do not allow an electric current to flow through them are known as insulators. Materials such as glass,... View Article
Which of the following is the correct sequence of layers from the outermost surface of the earth to its centre?
The crust is the outermost layer of the earth. The mantle comes next followed by the outer core. The inner... View Article
Fill in the blanks
Kirchhoff’s first law is in accordance with the law of conservation of _____. energy charge mass entropy Answer: 4.entropy Explanation: Kirchhoff’s... View Article
PN-junction diode works as an insulator, when connected in?(a) To A.C (b) In forward bias (c) In reverse bias (d) None of these
When the PN junction diode is connected in reverse bias no current flows and works as an insulator. When a... View Article
Earth is a________
Answer: Earth is one of the eight planets of our solar system. Solar System The solar system also contains 8planetswhich... View Article
What is an electric switch?
The switch is a simple device used to either break the electric circuit or complete it. Electric switch The most... View Article
A curve between magnetic moment and temperature of magnet is
The magnetic moment is inversely proportional to temperature The magnetism of a magnet falls with rising temperature and becomes practically... View Article
John uses the circuit as shown, to stimulate the traffic light for pedestrians. When the switch is closed, which of the light bulbs lights up?
When the switch is closed, current passes through the circuit and the solenoid behaves as an electromagnet; thus attracting the... View Article
A body of weight W, experiences an upthrust R in water. What will be the apparent weight of the body and apparent density of the body when W = R?
When W = R, the apparent weight will be zero and apparent density is zero.
Melting point of ice_______________
Answer: The melting point of ice decreases with an increase in pressure. The melting point is usually defined as the... View Article
Newton’s law of cooling is used in laboratory for the determination of the
Newton’s law of cooling is used for the determination of specific heat of liquids.
A tester for detecting electric current utilizes some effect of electric current to detect its presence. Which of the following components can be used for this?
All of these can be used to detect current. A light bulb and an LED will glow if current passes through... View Article
The graph between current (I) and potential difference (V) in the experimental verification of Ohm’s Law drawn by four students. Which one is correct?
The relationship between the current flowing through a metallic wire and the voltage across its terminals is described by Ohm’s... View Article
As shown in the diagram, a wire carrying a current pointing out of the paper is placed in a magnetic field. Towards which of the following points does the wire move?
According to Fleming’s left hand rule, the direction of motion of wire will be upwards, that is, towards point P.
